Iman Gamal Morsi Wireless Gas Detector System Using Microcontrollers, PLC and SCADA System for Monitoring Environmental Pollution
Gas identification represents a big challenge for improving detection &#97;&#110;&#100; pattern
recognition of each gas by using inexpensive gas sensor. This paper presents a gas detector system
which is built to monitor, &#97;&#110;&#100; measure gas pollutant emissions in the air &#97;&#110;&#100; also used to detect
different gases. The pollutants are ethane (C2H6) &#97;&#110;&#100; methane (CH4) which are located beside the
fertilizer factories in Alexandria Egypt &#97;&#110;&#100; some other gases as hydrogen (H2), propane (C3H8)
and isobutane (C4H10).The gas sensors TGS-2611, TGS-816, TGS-2620 &#97;&#110;&#100; TGS-823 from Figaro
Engineering Inc. are used to build agas detector system &#97;&#110;&#100; it is located in the site of measurements.
The data of each sensor is transmitted &#97;&#110;&#100; received wirelessly using XBee module (DigiXBee
802.15.4) &#97;&#110;&#100; microcontroller PIC 18F4620. The system is controlled &#97;&#110;&#100; monitored by using
programmable logic controllerPLC Step 7-200 from Siemens &#97;&#110;&#100; Supervisory Control &#97;&#110;&#100; Data
Acquisition SCADA systems respectively. The principal component analysis PCA method is
applied for clustering &#97;&#110;&#100; distinguishing among different gases. The results indicate thatmethane
can be detected using TGS-2611 better than other sensors.Isobutane can be detected by using TGS-
2620 &#97;&#110;&#100; TGS-2611 better than others. Propane can be detected by using TGS-816 &#97;&#110;&#100; TGS-823
better than others. Hydrogen can be detected using TGS-2620, TGS-816 &#97;&#110;&#100; TGS-823 better than
others.